Shaver



I. JEPSON Nov. 15, 1955 SHAVER 3 Sheets-Sheet 1 Original Filed Oct. 29,1947 R O T N E V N VAR JEPSON Nov. 15, 1955 JEPSON 2,723,452

SHAVER Original Filed Oct. 29, 1947 3 Sheets-Sheet 2 64 I w 64 4/ 25 IG.5 4a K54 F IG .5 149 79 as INVENTOR VA R JE PSO/V 4 0 8 WW; W W

Nov. 15, 1955 l. JEPSON 2,723,452

SHAVER Original Filed Oct. 29, 1947 3 sh ets-Sheet 3 H6752 FIG-5INVENTOR VAR JEPSo/v FIG. IO.

5] 7):"(famn M A m United States Patent "ice Divided and thisapplication December 22, 1952, Serial No. 327,244

17 Claims. CI. 30-43 This invention relates to anf-electric shaver.

In electric shavers of thetype using a linkage for changing therotational motion of a r'nht'or's'haft to an'es'cillatory movement in acutterbl'ade, the'rspective parts forming the linkage are undertremendous strains. In instances where the motor speed 'may' bein excessor 8000 revolutioris per minute, pressures in encess'of a ponnd'and ahalf on the respective parts of the linkage are encountered.Suchpressures together with friction, wear, and heat in cident thereto,cause an early fatiguing argue-metal parts. Accordingly, it is an objectof this invention toprovide a novel drive mechanis'm'that insures arelatively long life under the extreme conditions outlined above.

This is a division bf my de endin application Serial No. 782,761, filedOctober 29, 1947, now Patent No. 2,648,898, granted August I8,- 1953.

Another object of the invhtihnis' to provide a shaver of the typedescrihed'char'acteiized bye comb having a shaving area substantiallylarger than was heretofore praciicable, azembinen with "a u'tti""oscillatiii'g' 'ards's "silch larger area. This materially in reasesthe diincuuies incident to the operating c'onditioh's"desrihedf and ihyinvention aims to "provide an imprdved shaver head and drive "mechanismfor such conditions.

Another object'of the inventitin is the prnvision in a razor of theabbvecharacterhavingla linkage with a shaft with novel means anminimizing the axial bodily move ment of the shaft.

Another object of the invention is the provision in an electric :razorof the (above character of novel means for securingacombrin'ipositioniat onee'nd of the-razor.

Another object of 'the'invention is the provision in an electric razorof novel ine'ans for receiving :halir clippings and the like.

Astill further object of "the inventibnEis the pfovisiori of an electricrazor in lWhlffh the component parts can be easily assembled, which arerugged, and 'which are relatively inexpensive to manufacture.

Other objects and advantages of :the invention will be come apparentfrom the following detailed description taken in connection with theaccompanying drawings, in which v v i I,

Figurel is a side elevational vie'w having :a cutaway portion of anelectric razor embodying my ;present inefl Figure 2 is an endelevational view with acutaway portion ofan electric razor emb mg m rr/mean;

Figure 3 'is a side elevatic'inal'viewwith a cutaway por- 'tion showingthe "coiistrhctio'n "of the head "end (if "the razor;

Figure 4is an entl view similar "to'I Figiirb :3; I Figiire Sisanelevatidnal vi'e'w of the head eiidof the razor with some of thepar'tsr'e'moiied';

Figure 6 is a fragmentary seetidnal view'similarfo Figure 4 snewingthepartsin a difierenrpo'sitiofi;

Figure 7 is a sectional view shtiwing details er cens'truction ofthepower t'erminal'end of the razor; 'Fi'gtlre'S is anend viewhir'nilarto' Figu'i'e 7;

mass of the oscillating parts.

2,723,452 Patented Nov. 15, 1955 Figure 9 is an exploded view showingone of the parts forming the head and the drive mechanism;

Figure 10' is a diagram showing the present comb in comparisonwith theprior comb; and

'Figure 11 is a top view of a spring member which coacts with the comblocking plates, as viewed on'the section line 1111 of Figure 3. a

Referring now to the drawings, the invention is shown embodied in anelectric razor 11 of the type used in shaving beards and for removinghair from other parts of the body. The razor comprises a cutter 12coacting with a comb 13 secured to comb supports 14 mounted on a head 15at one end ofthe razor 11. The cutter 12 is positioned so that it isurged outwardly into constant engagement with the comb13 'by centrifugalforce combined with spring force. This principle is disclosed in PatentNo. 2,081,694. According to the present invention the spring force is'applied by means of a spring17 mounted in each spaced support 18. Thelatter are rigidly mounted to a shaft 19 journaled by bearings 21received in openings 22 in side portions 23 of the head 15. Herein theshaft 19 is driven by a rotatable eccentric 24 through a'drive bracket26. The eccentric 24 and bracket 26 are arranged to translate rotationalmotion of the eccentric 24 to an oscillatory motion in the shaft 19 andthe cutter 12. 'The eccentric 24 herein is driven by an electric motor27 mounted in a case 28 preferably shaped to be conveniently grasped inthe users hand.

with a shaving area substantially larger than in prior shavers of thistype. As shown in Figure 10, the arc A shows the ou'tside diameter of acomb according to the present invention, on the same scale as thedrawings; and the arc B is the outside diameter of aprio'r comb. Inactual practice the comb plates are of .002" sheet steel and the radiusof comb A from its cutting surface to the center is /2,. while thesimilar radius for the combB is Assuming the angular movement of thecutter is the same in both cases as denoted by the angle C, the cutterhas much greater lineal travel in the arc A than in the arc B; also,thelarger radius would require greater in view 'of the increased massand the high speeds, very: high inertia forces are produced in additionto the increased centrifugal force, and this'presents conditions andproblems working against the desired long life in a device of this kind.For example, where the size of an oscillating part such as the shaft 19is increased, the moment of inertia is increased in proportion to the5th power, meaning that where the shaft is twice the size of apr'iorconstruction the inertia forces built up in the shaft are 32 timesas'large. And, since lhGjbGBIlHg PIESSUI'E-OH the crank drive pin oreccentric 24 is proportionalto the amount of inertia of the oscillatingparts,.'this pressure will also be increased 32 times. Also, furtherproblems are presented because with increased radius of the cutter thecentrifugal force working outwardly against the comb is increased inproportion to the radius. These conditions present difficult problems offriction, wear, and fatigue of metals, which affect'the life of a deviceof this kind. 'My invention has, therefore, provided novel constructiondesigned to meet these problems in a commercially satisfactory manner.

The present invention provides a cutter and its support of substantiallyreduced mass, considering the large radius and travel. The supports 18,integral with the shaft 19 and originally solid metal, are bored outfrom the 'bottom as shown in Figure 3, the bore terminating short of theend. Each support is then milled transversely in a manher .to provide ashort openingZti at the outer side and a long opening .20 at the innerside, as shown in Figures 3 and 9. The-cutter 12,.reduced to minimur'ndimensions is mounted for sliding support in the slotted ends of thesupports 18. As a means of providing sufficient bearing for the cutterin the supports I have provided narrow legs 30 which slide in the slots.The lower end of each leg is reduced to a small size sufiicient to enterthe small bore in the corresponding support. This lower end of each legbears against a small disc 30 which seats on the top of each spring 17.Each spring is retained at its lower end by swaging the open end of thebore as shown in Figure 3. The legs 30 provide increased bearing surfacefor the cutter. Also, the outer edge of each leg has lateral bearingsupport at all times against the wall of the bore and the inner side ofeach leg is free to move lengthwise in the longer slot at the inner sideof the support. In this way the cutter is guided against lateraldisplacement and it is free to move in a radial direction in response tocentrifugal force and also in response to the springs. This constructioncontributes to minimum mass of the oscillating parts.

Also directed to this phase of the invention is the construction of thedrive bracket 26 so that the latter will have a relatively long lifeunder the extreme service conditions encountered in an electric shaverin which the moving parts thereof reverse their direction of movementmany thousands of times a minute. For this purpose the drive bracket 26comprises a portion 29 (see Figure 9) having an elongated slot 31 shapedto receive the eccentric 24 and a resilient portion 32 for connectingthe slot portion 31 to the shaft 19. As best shown in Figures 3, 4 and 9the slot portion 31 of the bracket is formed herein by spaced elongatedmembers 33 joined together at opposite ends by integral members 34. Tominimize friction between the side walls of the slot 31 and theeccentric 24 the walls of the slot are lined with strips 36 of materialpreferably providing a good bearing surface and also having goodinsulating qualities so as to insulate the eccentric 24 from the cutter12. The resilient portion 32 herein is formed by spaced arms 37 integralrespectively with a central portion of one of the spaced elongatedmembers 33. Preferably the arms 37 are rigidly secured to a centralportion of the shaft 19 as by rivets 38. To increase the resiliency ofthe respective arms 37 apertures 39 are formed therein intermediate therivets 38 and the interconnection with the spaced elongated members 33.It is to be understood that with the construction of the drive bracket26 shown herein it can be formed as a single stamping from resilientmaterial and then preshaped to the desired form in a simple formingprocess. It is also to be understood that because of the resiliency theshock load on the eccentric 24 at the end of each stroke is minimized.

Preferably the eccentric 24 and the drive bracket 26 are operable todrive the cutter 12 without being exposed to hair clippings falling inthe cutter chamber 41 (see Figures 3 and 4). To this end the eccentric24 and the lower portion of the drive bracket 26 as shown in therespective drawings are disposed in a chamber 42 in the head 15 belowthe shaft 19. Herein the chamber 42 is formed by the side portions 23and walls 43 integral with the respective side portions 23. Theresilient portion 32 of the drive bracket connected to the shaft 19 isdisposed in a housing 44 having a chamber 46 formed therein, incommunication with the chamber 42. The chambers 42 and 46 are of suchsize and shape as to permit freedom of movement of the respective drivebracket 26 and eccentric 24 during operation of the razor. The shaft 19projects through openings 47 in walls 48 of the housing 44. The openings47 are in alinement with the bearings 21 supported in the side portions23 and are of such. dimensions that a clearance is provided between thewalls 48 and the shaft 19 which permits free oscillatory movement of theshaft and prevents the entrance of hair clippings to the respectivechambers along the shaft 19. It; will be seen that with thisconstruction the eccentric 24 and the drive bracket 26 are completelyenclosed.

Another aspect of my invention is concerned with an improvedconstruction for securing the comb unit in position at the end of therazor. To this end I provide comb locks on each side of the head whichwhen in the secured position are stressed so as to positively secure thecomb unit on spaced shoulders 49 formed on each side of the head 15, andwhich can be readily removed from engagement with the comb unit when itis desired to remove the comb unit for cleaning or for replacement ofthe comb and also the cutter.

Each comb lock is in the form of a plate 51 (see Figures 4 and 6) havinga tongue 52 on one end shaped to interfit in a slot 53 formed in thelower portion of the comb unit. Each tongue 52 is formed with a camsurface 54 arranged for snap engagement in the slot 53 in the comb unit,as shown in Figure 4. Each plate 51 has a hinge-like connection at itslower end to a spring member 56 which is stressed to pull the platedownwardly and yieldingly hold the tongue 52 engaged in the slot 53. Thespring members 56 are formed integral with a plate 40 of spring steel(see Figure 11) disposed between the head 15 and a bearing block 57 ofthe motor 27, the spring plate 40 being shaped to cover the entire topof the bearing block and having suitable openings for the motor driveand for fastening screws. Each spring member 56 extends the full widthof its companion plate 51, thus providing a continuous hinge-likeconnection and a strong and durable spring action for retaining the combin position under all service conditions. To disengage the tongue 52 andslot 53 it is only necessary to insert a thumbnail between the upperedge of the plate 51 and the comb assembly and apply a slight outwardpressure. The plate 51 may then be swung down to the open position shownin Figure 6. The spring member 56 acts to retain the plate 51 in thisopen position, exerting a downward pressure against the plate 51, aswill be presently described.

Another important feature of my construction is the chambers 58 formedon each side of the shaver 11 for receiving the hair clippings. Hereinthe chambers 58 are formed between the side walls 43 of the head 15 andthe comb locking plates 51. Each of the chambers 58 is in communicationwith the cutter chamber 41. Preferably the exterior of the housing 44disposed in the chamber 41 is arcuate shaped (see Figure 4) so that hairclippings falling thereon are deflected into the side chambers 58.Access to the chambers 58 for cleaning purposes is effected bydisengaging the tongue 52 from the slot 53 and swinging the plates 51about its said hinge-like connection. This hinge is formed by bending anouter portion 59 of the spring member 56 in a downwardly curveddirection as shown in Figure 4 and bending a lower portion 61 of theplate 51 in an upwardly curved manner to interfit with the curvedportion 59 of the spring member 56. It is to be understood that when thetongue 52 is disengaged from the slot 53 as in removing the comb thespring member 56 tends to assume an unstressed position. As a result,the plates 51 are moved bodily downwardly so that the curved edge 61 ofthe plate engages an edge 62 (see Figure 6) of the casing 11. To gainaccess to the chambers 58 the end of the plate 51 is swung outwardly tothe position as shown in Figure 6. During the movement of the plate 51to this position the curved edge 61 is rotated in a counterclockwisedirection on the edge 62 of the case to bring its interlocked or hingedend to a passed center position in which the downward pressure of thespring member 56 holds the plate 51 in the open position shown in Figure6. That is, the end portion 61 in effect goes through an overcenterposition and the plate 51 is yieldingly held in such position by thespring member 56. A slight movement of the plate 51 in the direction toreturn it to the position shown in Figure 4 causes the spring member 56to go overcenter in the opposite direction and assume an unstressedposition. As a result the plate 51 will be swung about its hinge to anupright I position with its tongue 52 against the comb unit and-ready tobe snapped into interlocking "engagement therewith.

Another phase of my invention is concerned with constructing the head 15of the razor in such a manner as to facilitate assembly of therespective parts mounted in and supported thereby. Herein I form thehead in two separable parts 63 which when joined together along a common plane passing substantially through the longitudinal axis of theshaft 19 forms the unitary head. Each of the parts 53 is identical andassumes the shape best shown in Figure 9. Each of the parts comprisesside members 64 having recesses 66 which when two -parts are securedtogether form the bearing openings 22 (see Figure 3). an intermediateportion '67 spaced from the side portions 64 and when the parts 63 areassembled form the housing 44, webs 68 and 69 interconnecting the sideportions 64 and the intermediate portion 67 and flanges 71 utilized inmounting the head 15 on the motor 'block 57. A'dowel pin 72 on one part63 shaped to fit iii an opening 73 in another part 63 may be utilized toaline the respective parts 63. In assembly, the that face of each part,lying in a common plane, abuts the corresponding face ofthe otherpart63. Any suitable means may be utilized for scouring these partstogether, such as two screws 74 (see Figure 3) extending through one ofside portions 64 "into threaded engagement with a corresponding part 64.

Means is provided for controlling the axial movement or end play of thecutter shaft 19. To this end'thesleeve bearings 21 (see Figure 3)mounted in'the sideportions 23 are formed with shoulders 76 shaped toabut against shoulders 77 formed on the shaft 19. The sleeve bearings 21are of sufficient length so that aportion 78 of the head 15 adjacent theopenings 22 receivingthe bearings 21 may be deformed to engage the "endof the bearing opposite the shoulders 76 and thereby positively positionthesleeve bearings 21. In assembly of the component artsofthe' head 15the sleeve bearings 21 are normally placed on opposite ends of the shaft19 and the shaft with the cutter supports 18 and drive bracket 26 aremounted in one of the parts 63. The mating part 63 of the head 15 isthen brought into position so that its edge portions abut the edgeportions of the other part and then the screws 74 are threaded intoposition from each side of the head 15. The completed head is thenplaced in a machine and the portions 78 of the head 15 adjacent theopenings receiving the bearings 21 are deformed as by a spinningprocess. It is to be understood however that there is sufficientclearance between the shoulders 76 and 77 to permit freedom of angularmovement of the shaft 19 and whilea't the'same time preventing axialmovement of theshaft.

While any suitable motor 27 may he used to drive the eccentric 24 Iprefer to use a motor or the type described in detail in my co-pendingapplicationfSerialNo. 783,419, filed October 31, 1947, now Patent No.2,662,194, granted December 8, 1953. Preferably, the motor eomprises afield structure "79 composed of tWo separable pieces secured together bylinks 81 at opposite ends thereof and having field coils wound on spools82 formed by two interlocking portions to form a unitary field structureor "a generally elongated rectangular shaped cross-section encircling anarmature 83. The latter is supported by,a shaft '84fin self-aliningbearings 86 (see Figure i) and se"'e Figure 7) supported in bearingblocks 57 and 89 secureddn a suitable manner to opposite endsrespectively "of the field structure 79. I

While any suitable means may be utiliz'edfor securing the motor 27 tothe head I utilize screws "80 projecting through the flanges 71 on eachside of the head ahd threaded into the bearing block 57. The universalInstor shown herein is a series motor of the commutatihg type. Means isprovided for effecting a connection between brushes 91 and the motorcircuit that facilitates assembly and maintenance of the motor. For thispurpose I utilize tubular shaped brush holder's 92 ("see the 7) shapedto hold the brushe'sm and provide a r"e"- movable cap 93 electricallyconnected in the motor cir cuit and shaped to fit over the end of eachtubula r member 92 to effect a connection between the brush holders 92and the motor circuit. As best seen in Figure 7 the motor hereinutilizes two brushes 91. The brushes are received in the brush holders92 herein in the form of tubular sleeves supported by the bearing block89 so that one end of each sleeve is disposed adjacent acommutator 94and the other end projects through a wall 96 of a commutator chamber 97formed in the bearing support 89. The sleeves 92 are disposed onopposite sides of the commutator 94 in a predetermined manner to obtainproper commutation. The outer enclof each sleeve 92 is formed with ahead 98. The cap 93 herein is formed with a central portion 99 anddepending silient fingers 101 shaped to interfit with the head 98 so asto secure the cap 93 to the end of the sleeve 92. A. portion 102 of eachcap 93 is shaped so that field le'ads 103 can be secured thereto as byhooking an end of each lead 103 through an opening in the portion 102and soldering the respective parts together. The pressure of each brush91 on the commutator 94 is determined by a spring 104 disposed "betweena shoulder 1116 formed on' the brush 91 and the cap 93. Thisconstruction is [advantageous in that the electrical connections and thebrushes 91 are readily accessible from the exterior of the motor 27 formaintenance and service purposes. It also permits the use of arelatively long spring 104 be tween the position 91 and the cap 93 whichis desirable since the longer the spring the less variation there willbe in brush pressures on the commutator 94 as the brush wears down inuse. In some applications such as when the motor is used in the case 23which is formed by separable parts joined together as described in myprior Patent No. 2,530,302, 1 utilize a strip of mica insulas tion 107between the cap 93 and the case 28. This provides additional protectionto the user of the razor against induced voltages in the motor and thelike because the case is split at this point.

Frequently, in electric razors the construction of power terminals 108and a plug not shown) for connecting the respective terminals to asource of power is such that a positive connection between therespective parts is not always assured. This is aggravated by the factthat in operation, particularly where the power terminals are located ata lower portion of the electric razor the weight of the attachment plugand connected cord tends to pull the plug from engagement with theterminals 108. A construction of the power terminals 168 is shown hereinfor positively assuring an electrical connection under extreme serviceconditions. To this end the power terminals are formed as elongatedprong members projecting through an insulating panel 109, slidablydisposed in spaced opposed grooves 111 formed on opposite sides of arecess 112 receiving the terminals 108 at the extreme outer end of thebearing block 89. As shown in Figure 7 the recess 112 is disposed sothat the terminals 168 are accessible from the exterior of the case 28through an opening 113 formed therein. Field leads 114 are connected tothe terminals 103 through eyelets 116 embrac ing one end of theterminals 108. Herein the eyelet 116 is disposed between an insulatingmember 117 on one side of the insulating panel 109 and a peened end 118on each terminal 108. The peened end 118 in effect forms a rivetedconnection which coacting with an annular shoulder 119 formed on eachterminal on the opposite side of the insulating panel 109 secures theterminals 108 thereto in a rigid relation. The end of each terminal 108projecting into the, recess 112 is formed with an axially extending slot121 (see Figure 8) that substantially bisects the'terminals 108. Withthis construction each of the bisected parts of the terminal is slightlyresilient and when in use with a plug of predetermined design asdescribed in my co-pending application will be stressed so that theouter ends of each bisected terminal are moved toward each other in astressed condition. In

termediate the ends of the terminals 108 the latter are deformed as byforming an annular bead 122 thereon. Preferably the plug (not shown) isformed with sleeves having an annular recess shaped to receive theannular shoulder 122 formed on the prongs 108.

In some motor applications the axial movement and end play of the shaft84 must be maintained within extremely close tolerances to insureoptimum operation. A construction for minimizing the end play of theshaft 84 when the motor 27 is used for driving the electric razor 11 isshown in Figures 3 and 4. Thus, an abutment 123 is formed on the shaft84 as by a collar being press fitted on the shaft adjacent an insulatingdisc 124 disposed adjacent the bearing 86. A washer 126 is disposedbetween the collar 123 and a sleeve member 127 of the self-aliningbearing 86. A second washer 128 is disposed between the opposite end ofthe sleeve member 127 and a shoulder formed on an eccentric supportingshaft 131, rigidly mounted at one end on the shaft 84. The washers 126and 128 are selectively chosen during assembly of the motor 27 so thatonly washers of a .thickness permitting the shaft 84 to freely rotatewithout appreciable end play are utilized in the assembly.

The eccentric 24 may be secured to the shaft 84 in any suitable manner.Herein by way of illustration the eccentric 24 is mounted on the shaft131 which is threaded into the end of the shaft 84. Preferably, theeccentric is mounted in an insulated relation with respect to the shaftso that induced voltages in the armature 83 and the shaft 84 areprevented from passing to the comb 12 and the case 28. As shown inFigures 3 and 4 the eccentric 24 is in effect integral with and projectsupwardly from a washer 132 mounted on the shaft 131. The inner openingof the washer is preshaped to fit about an insulating washer 133 mountedon the shaft. Insulating washers 134 and 135 are disposed in spacedaxial relation on opposite sides of the washers 132 and 133. Therespective washers are secured between a shoulder 136 and a Washer 137by peening over an end 141) of the shaft 131 so that it engages thewasher 137 and in effect rivets the respective washers together.

Suitable provision is made for oiling the motor bearings 86 and 87 fromthe exterior of the case 28 in which the motor is supported. For thispurpose passageways 138 formed in bosses 139 on the exterior of the case28 are positioned to form a continuation of passageways 141 incommunication with the bearings 86 and 87 respectively and extendingthrough bearing blocks 88 and 89 respectively. To facilitate alinementof the passageways each boss 139 is shaped to interfit in a recess 142formed in one end of the passageways 141 in the respective bearingblocks. The recesses are somewhat larger than the bosses so as to allowfor tolerances in manufacture. To prevent leakage of oil from thepassageways to the motor a gasket 143 is disposed between a shoulder 144on the brush and each respective bearing block.

The case 28 shown herein is formed in two parts as described in detailin my prior Patent No. 2,530,302, referred to above. Each of the partsis secured to the motor assembly in a rigid manner as by screws 146 (seeFigure 3) securing one end of the case to the head 15, screws 147 (seeFigure 7) securing the opposite end of one of the parts to the motor andscrews 148 securing the opposite end of the other part to the motor.Preferably a shield 149 overlies the screws 146 and joints between theparts so that the case has a neat and attractive appearance. Each shieldis secured to the case 28 by a bracket 151 (see Figure 3) interfittingwith a clamp 152 secured to the case 28 and by deforming an end 153 ofthe shield 149 to engage a shoulder 154 (see Figure 7) formed adjacentthe opening 113 at the power terminal end of the razor.

While there has been illustrated and described What is at presentbelieved to be the preferred embodiment of the present invention,numerous changes and modifications will occur to those skilled in theart, and it is aimed 8 in the appended claims to cover all such changesand modifications as fall within the true spirit and scope of thepresent invention.

What is claimed as new and desired to be secured by Letters Patent ofthe United States is:

l. A shaver having, in combination, an arcuate comb, a cutter, means foroscillating the cutter in coaction with the inner side of the combincluding a rock-shaft having a pair of tubular supports spaced apartlongitudinally thereof and extending radially therefrom, the supportsbeing slotted from the outer end inwardly in a plane parallel with theaxis of the shaft, the cutter having a body of comparatively narrowradial dimension and having inwardly extending legs radially slidable inthe slotted supports, and spring means in each hollow support actingagainst the inner end of each cutter leg for urging the cutter outwardlyagainst the comb.

2. A shaver having an arcuate comb and a cutter adapted to be oscillatedat the inner side of and in coaction with a comb, and an oscillatoryshaft provided with a pair of tubular supports spaced apart lengthwisethereof and extending radially therefrom, said supports being radiallyslotted in a plane parallel with the axis of the shaft, the slot in eachsupport being longer along the inner side thereof than along the outerside whereby to provide a lateral bearing in the tubular wall of thesupport at its outer side, the cutter being disposed in said slottedsupports and provided with legs each extending into the tubular portionthereof and adapted to bear against said lateral bearing walls.

3. A shaver having an arcuate comb and a cutter adapted to be oscillatedat the inner side of and in coaction with the comb, an oscillatory shaftprovided with a pair of supports extending radially therefrom and spacedapart longitudinally thereof, means for supporting said cutter from saidsupports, means attached to the shaft intermediate said supportsextending radially from the shaft in a direction opposite from thesupports and equipped at its opposite end with laterally spaced bearingsurfaces parallel with the shaft, and a crank member adapted to operatebetween said bearing surfaces for oscillating the shaft.

4. A shaver having an arcuate comb and a cutter adapted to be oscillatedat the inner side of and in coaction with the comb, an oscillatory shaftprovided with a pair of supports extending radially therefrom and spacedapart longitudinally thereof, means for supporting said cutter from saidsupports, means attached to the shaft intermediate said supportsextending radially from the shaft in a direction opposite from thesupports and equipped at its opposite end with laterally spaced hearingsurfaces parallel with the shaft, a crank member adapted to operatebetween said bearing surfaces for oscillating the shaft, said shaftbeing a one-piece member having bearing portions at opposite ends andsaid cutter supports being integral with the shaft with each supportlocated adjacent to the inner end of a shaft bearing portion, and saidmeans at the opposite side of the shaft comprising a sheet metal memberformed to U-shape having its spaced arms fixed to opposite sides of theshaft intermediate the supports.

5. For use in a shaver of the type having an arcuate comb and means foroscillating a cutter in coaction with the inner side of said comb whichmeans comprises a rock-shaft having a pair of tubular supports spacedapart longitudinally thereof and extending radially therefrom and whichsupports are slotted from the outer end inwardly in a plane parallelwith the axis of said rock-shaft, an elongated cutter having a pair oflegs projecting from one side and receivable within said tubularsupports, each leg having a bearing surface at its outer side capable ofbearing against a cooperating wall in said tubular supports, each leghaving a portion at its inner side receivable within the slots definedin said tubular supports, each of said legs terminating in a reduced endformed by cutspasms ting away the inner side'thereoflsandwhich reducedend of each leg is capableof being wholly received withinithecorresponding tubular support. p

6. In a shaver having an *arcuate comb and a cutter adapted to beoscillated'at the inner side ot "and in coaction with the comb, anoscillatory shaft provided -with spaced supports for carrying thecutterin coaction with the comb, means connected to the tshaftandoperable :for oscillating it, and a head in which said shaft is mounted,said head being'shaped to provide awall partitioning said oscillatingmeans from the cutter, saidrpartition wall extending to the side of theshaft remote from the cutter and extending around'the shaft'and-enlosingmsnpuniun thereof located between the cutter supports at th'es'ide ofthe shaft adjacent to the cutter.

7. A shaver as set forth in claim 6, in which the head is provided withside walls and a bearing in each side wall for one end of the cuttershaft, and in which each cutter support is oscillated in the spacebetween the adjacent side wall and the enclosing portion of thepartition wall.

8. A shaver as set forth in claim 6, in which the head is formed of twohalf sections adapted to seat one against another in a planeintersecting and parallel with the axis of the shaft, said partitionwall being composed of portions from each such section, and means forsecuring said sections together to form a unitary head.

9. A shaver comprising a cutting blade, driving means including a shaftfor actuating said blade and having spaced shoulders formed thereon, ahead for supporting said shaft, said head comprising two separable partshaving spaced edge portions, each of said edge portions being recessedso that when said portions are in an assembled position alined openingsare provided for said shaft on opposite sides of said head, bearingmeans for said shaft disposed in said openings and disposed to abut saidshoulders on the shaft, and means for clamping said parts in a tightlyassembled relation whereby to positively position said bearings relativeto said shoulders to minimize axial displacement of said shaft.

10. A shaver comprising a cutting blade, driving means including a shaftfor actuating said blade, a head for supporting said shaft, said headcomprising two separable parts having spaced edge portions abuttingtogether at a plane substantially common with a longitudinal axis ofsaid shaft, each of said edge portions being recessed so that when saidportions are in an assembled position alined openings are provided forsaid shaft on opposite sides of said head, bearing means for said shaftdisposed in said openings, means acting between said housing and saidshaft for minimizing axial displacement of said shaft, and means forclamping said parts in a tightly assembled relation.

11. In a shaver, a head comprising two substantially identical partsmounted in an abutting relation to form spaced side portions and anintermediate portion spaced from the side portions, said side portionshaving alined apertures formed therein, said intermediate portion havingspaced apertures in alinement with said apertures in the side portions,a cutter mounted at one end of said head, means for driving said cutterincluding a drive shaft extending through said apertures, said driveshaft having spaced shoulders formed thereon at points between saidupstanding side portion and said intermediate portion, bearings mountedin said openings in the side portions and abutting said shoulders, andmeans for holding said parts in a tightly assembled relation whereby tosecure said bearings in a predetermined abutting relation with saidshoulders on the shaft to minimize end play thereof.

12. In a shaver, a head comprising two substantially identical preshapedparts mounted in an abutting relation to form spaced upstanding sideportions and an intermediate portion spaced from the side portions, saidside portions having alined apertures formed therein, said intermediateportion having spaced apertures in alinement with saidflapertures in-the side portions, a cutter mounted at one end of said head, meansfifor:driving said cutter including a drive shaft extending through-saidapertures, said drive shaft having -spa'cedshoulders formed thereon-atpointsbetween said upstanding sidetp ortion and said intermediateportion, sleeve -bearihgs mounted in said openings in the sideportion's,;said bearings shaped atone end toabut said shoulders, saidside'portions being deformed to engage the opposite ;end of said sleevebearings to positively position said shafton said head, and means forhOIdiHg'SElidsFZItS in a tightly assembled relation.

13. A shaver comprising a ,cutter, driving means in cludinga shaft foractuating saidwblade and havingspaced shoulders formed theredm-a, headfor supportingsaid shaft at spaced positions, said head being formed bytwo substantially identical parts, having spaced edge portions and anintermediate portion spaced from said edge portions, said edge portionsand intermediate portions of one part being shaped to abut therespective edge portions and intermediate portion of the other part toform a unitary head having spaced side portions and an intermediatehousing, said side portions and said housing having alined openingsformed therein for the reception of said shaft, sleeve bearings mountedin said openings in the side portions for supporting said shaft, saidbearings shaped at one end to engage said shoulders, said housing beingshaped to enclose a portion of the shaft between said shoulders, andmeans associated with said side portions for securing said partstogether in a tightly assembled relation.

14. In a shaver, a cutter, a shaft, spaced supports for mounting saidcutter and rigidly fastened to said shaft, a drive bracket rigidlysecured to said shaft at a point intermediate said cutter supports foreffecting movement of said shaft, a head for supporting said shaft andhaving a chamber at one end for receiving said drive bracket, said headbeing formed by two substantially identical parts having spaced edgeportions and an intermediate portion, said edge portion and saidintermediate portion of one part being shaped to abut the respectiveedge portions and intermediate portions of the other part to form theunitary head having spaced side portions and an intermediate housingspaced from said side portions having a chamber forming a continuationof said chamber for the drive bracket and permitting the latter to movebetween opposed positions, said housing being shaped to encase a portionof said shaft between said cutter supports and said drive shaft toprevent the entrance of hair clippings and the like thereto and to thedrive bracket.

15. In a shaver, a cutter blade, a head adjacent said blade having achamber formed therein, a motor rigidly attached to said head and havingan eccentric pin projecting into said chamber, a shaft supported by saidhead and having a portion thereof disposed in said chamber, spacedsupports rigidly mounted on said shaft and shaped to support said blade,and a drive bracket having a resilient portion rigidly connected to saidshaft and having a portion with an elongated slot shaped to receive saidpin, said pin during operation of said motor moving back and forthlongitudinally of said slot so that the rotational motion of said motoreffects an oscillatory movement of said cutter, through said drivebracket, said shaft and said blade supports, said resilient portion ofthe bracket shaped to minimize the shock load effect on the respectiveparts as produced by reversal in direction of movement of the pin in theslot.

16. In a shaver, a cutter blade, a head having a chamber formed therein,a motor rigidly attached to said head and having an eccentric pinmounted therein for rotation and projecting into said chamber, a shaftsupported by said head and having a portion thereof disposed in saidchamber, spaced blade supports rigidly attached to said shaft, a drivebracket comprising a resilient portion rigidly connected to said shaftand a portion with an elongated slot shaped to receive said pin, said-portion connected to said shaft and having an aperture formed thereonto increase the resiliency thereof, said pin, during rotation thereof,being operable to move back and forth longitudinally of said slot sothat the rotational motion of said pin efiects a rocking motion of saidcutter, through said drive bracket, shaft and blade supports, saidresiliency of the drive bracket minimizing the shock load effect on thebracket when the direction of movement of the pin is reversed.

17. A shaver having, in combination, an arcuate comb, a cutter, meansfor oscillating the cutter in coaction with the inner side of the combincluding a rock-shaft having a pair of supports spaced apartlongitudinally thereof and extending radially therefrom, the supportsbeing References Cited in the file of this patent UNITED STATES PATENTSBruecker May 25, 1937 Jepson et a1 Feb. 27, 1945

